| Message ID | 20200221161826.21291-1-alexandru.ardelean@analog.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] iio: amplifiers: ad8366: add support for HMC1119 Attenuator | expand |
On Fri, 21 Feb 2020 18:18:26 +0200 Alexandru Ardelean <alexandru.ardelean@analog.com> wrote: > From: Sergiu Cuciurean <sergiu.cuciurean@analog.com> > > This change adds support for the HMC1119 Silicon Digial Attenuator. The > HMC1119 is a broadband, highly accurate, 7-bit digital attenuator, > operating from 0.1 GHz to 6.0 GHz with 31.5 dB attenuation control range > in 0.25 dB steps. > > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/hmc1119.pdf > > Signed-off-by: Sergiu Cuciurean <sergiu.cuciurean@analog.com> Applied, thanks. Jonathan > --- > drivers/iio/amplifiers/ad8366.c | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c > index 95972ab60f42..62167b87caea 100644 > --- a/drivers/iio/amplifiers/ad8366.c > +++ b/drivers/iio/amplifiers/ad8366.c > @@ -5,6 +5,7 @@ > * AD8366 Dual-Digital Variable Gain Amplifier (VGA) > * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > * ADL5240 Digitally controlled variable gain amplifier (VGA) > + * HMC1119 0.25 dB LSB, 7-Bit, Silicon Digital Attenuator > * > * Copyright 2012-2019 Analog Devices Inc. > */ > @@ -27,6 +28,7 @@ enum ad8366_type { > ID_AD8366, > ID_ADA4961, > ID_ADL5240, > + ID_HMC1119, > }; > > struct ad8366_info { > @@ -62,6 +64,10 @@ static struct ad8366_info ad8366_infos[] = { > .gain_min = -11500, > .gain_max = 20000, > }, > + [ID_HMC1119] = { > + .gain_min = -31750, > + .gain_max = 0, > + }, > }; > > static int ad8366_write(struct iio_dev *indio_dev, > @@ -84,6 +90,9 @@ static int ad8366_write(struct iio_dev *indio_dev, > case ID_ADL5240: > st->data[0] = (ch_a & 0x3F); > break; > + case ID_HMC1119: > + st->data[0] = ch_a; > + break; > } > > ret = spi_write(st->spi, st->data, indio_dev->num_channels); > @@ -118,6 +127,9 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, > case ID_ADL5240: > gain = 20000 - 31500 + code * 500; > break; > + case ID_HMC1119: > + gain = -1 * code * 250; > + break; > } > > /* Values in dB */ > @@ -164,6 +176,9 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, > case ID_ADL5240: > code = ((gain - 500 - 20000) / 500) & 0x3F; > break; > + case ID_HMC1119: > + code = (abs(gain) / 250) & 0x7F; > + break; > } > > mutex_lock(&st->lock); > @@ -246,6 +261,7 @@ static int ad8366_probe(struct spi_device *spi) > break; > case ID_ADA4961: > case ID_ADL5240: > + case ID_HMC1119: > st->reset_gpio = devm_gpiod_get(&spi->dev, "reset", > GPIOD_OUT_HIGH); > indio_dev->channels = ada4961_channels; > @@ -298,6 +314,7 @@ static const struct spi_device_id ad8366_id[] = { > {"ad8366", ID_AD8366}, > {"ada4961", ID_ADA4961}, > {"adl5240", ID_ADL5240}, > + {"hmc1119", ID_HMC1119}, > {} > }; > MODULE_DEVICE_TABLE(spi, ad8366_id);
diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c index 95972ab60f42..62167b87caea 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -5,6 +5,7 @@ * AD8366 Dual-Digital Variable Gain Amplifier (VGA) * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) * ADL5240 Digitally controlled variable gain amplifier (VGA) + * HMC1119 0.25 dB LSB, 7-Bit, Silicon Digital Attenuator * * Copyright 2012-2019 Analog Devices Inc. */ @@ -27,6 +28,7 @@ enum ad8366_type { ID_AD8366, ID_ADA4961, ID_ADL5240, + ID_HMC1119, }; struct ad8366_info { @@ -62,6 +64,10 @@ static struct ad8366_info ad8366_infos[] = { .gain_min = -11500, .gain_max = 20000, }, + [ID_HMC1119] = { + .gain_min = -31750, + .gain_max = 0, + }, }; static int ad8366_write(struct iio_dev *indio_dev, @@ -84,6 +90,9 @@ static int ad8366_write(struct iio_dev *indio_dev, case ID_ADL5240: st->data[0] = (ch_a & 0x3F); break; + case ID_HMC1119: + st->data[0] = ch_a; + break; } ret = spi_write(st->spi, st->data, indio_dev->num_channels); @@ -118,6 +127,9 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, case ID_ADL5240: gain = 20000 - 31500 + code * 500; break; + case ID_HMC1119: + gain = -1 * code * 250; + break; } /* Values in dB */ @@ -164,6 +176,9 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, case ID_ADL5240: code = ((gain - 500 - 20000) / 500) & 0x3F; break; + case ID_HMC1119: + code = (abs(gain) / 250) & 0x7F; + break; } mutex_lock(&st->lock); @@ -246,6 +261,7 @@ static int ad8366_probe(struct spi_device *spi) break; case ID_ADA4961: case ID_ADL5240: + case ID_HMC1119: st->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH); indio_dev->channels = ada4961_channels; @@ -298,6 +314,7 @@ static const struct spi_device_id ad8366_id[] = { {"ad8366", ID_AD8366}, {"ada4961", ID_ADA4961}, {"adl5240", ID_ADL5240}, + {"hmc1119", ID_HMC1119}, {} }; MODULE_DEVICE_TABLE(spi, ad8366_id);